Don't log about no notification on GET requests

The pecan notifier hook was logging on every GET request
that it wasn't doing anything, which led to excessive logging.
This just eliminates it.

TrivialFix

Change-Id: Ie1262b54595f40f69c6859a09850845826ee8f14

neutron/pecan_wsgi/hooks/notifier.py

@@ -66,7 +66,6 @@ class NotifierHook(hooks.PecanHook):
             return
         action = pecan_constants.ACTION_MAP.get(state.request.method)
         if not action or action not in ('create', 'update', 'delete'):
-            LOG.debug("No notification will be sent for action: %s", action)
             return
         if utils.is_member_action(utils.get_controller(state)):
             return